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Focus 1.8 Tdci Gray Smoke And Hissing Sound From Engine On Hard Acceloration

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#1 Robjw



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  • Name: Rob
  • Ford Model: Focus 1.8 TDCI Sport
  • Year: 2007
  • Location: Yorkshire

Posted 30 March 2013 - 05:10 PM

Hi All

Have noticed on my Focus that when accelorating im getting a loud hiissing / blowing sound from engine and also gray smoke from exhaust, there are no performance or starting issues. Any ideas

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#2 Stoney871


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  • Name: Clive
  • Ford Model: 2015 Focus ST3 250BHP
  • Year: 2015
  • Location: Devon

Posted 30 March 2013 - 05:12 PM

Grey smoke is caused by brake fluid. It generally means that your brake master cylinder is bad, and is getting sucked through the vacuum brake hose.

#3 Preee


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  • Name: Paul
  • Ford Model: Focus Tit X Mk3.5 | Fiesta Zetec Mk7
  • Year: 2015
  • Location: Shropshire

Posted 30 March 2013 - 05:13 PM

Check for split pipes , would be my first thing on my list

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